[1.07 lb] Optics very good, mechanics quite good, fit to my Fuji X-T3 camera is good also but maybe slightly tight. It's less tight on my X-E1 but this is the same with all my Opteka and Meike lenses.
Images have punchy contrast and sharpness, with little if any chromatic aberrations. Hard to ask for more at this price and with these spherical optics. It is $20 more than the Meike and I think it is worth it for the image quality. Admittedly, the differences are slight.

Sharpness across the frame can be obtained at F5.6 to F8. Center sharpness is very good wide open. Bokeh is pleasant.

[Full-Frame] Sharp, very little vignetting, simple to use, and Fun! Set camera to shoot without lens & Aperture Priority. Focus (use visual focus aid if you want), use auto ISO or manual ISO. I use the AstrHori 27mm f2.8 on a Fuji X-A1. I view the pictures via HDMI on a large screen TV.
Use the above settings, and you can easily concentrate on the Subject & the Composition. Set aspect to 3:1, or to 1:1 for Fun!

[f/2] I bought this lens to use as a 75mm lens on my a6100; it produces sharp and good looking images. Highly recommended.

[1.07 lb] I had tried simpler Lensbaby lenses but never really liked the basic ones because they were too fidgety. I suppose the composer pro might have improved results, but this is a far superior product for roughly the same money.

[Manual Focus] I've read the reviews of this lens and decided to get it. I considered the few flaws (vignetting, somewhat soft edges, reduced contrast when shooting towards the light, and manual focus) to give it character and produce unique images. My actual experience with the lens is, so far, better than I expected. The build quality is excellent. It feels solid and operates smoothly. The images, when wide open (f2.0) show some vignetting and minimal softness around the edges, which I would have done in post processing anyway. The bokeh is beautiful. The pictures are very sharp, especially when the aperture is above f5.6. The lens is small, light, and fun to use. I had no issue with the manual focus or with getting the exposure right. It took me some time to get used to the narrow aperture ring that is placed in the front of the lens. I replaced the screw-on lens cap with a center-pinch one. This lens is perfect for the Nikon Z f.

[f/2] I didn't buy this lens for its quality optics or its sexy looks, I bought it for a creative project I'm shooting in black-and-white square format. The 1:1 crop factor moots any minor issues with edge sharpness and vignetting. The pancake design makes it easy to carry around and unobtrusive in public places. Manual focus is required, but practically everything is in focus when set to infinity. I'm using it paired with my Fujifilm X-T5 and the results are stunning. The absurdity of putting a $90 lens on a $1,700 camera and making art is very satisfying, indeed!

[f/2] It's small, features a hot shoe mount, and testing it against 3 other light meters I trust it very well calibrated out of the box. BTW charging time with a 2 amp wall wart via USB-C is about 40 minutes. However you will want to put on some readers and actually read the instruction manual because the controls are not intuitive.

[Full-Frame] Like Roger Ebert used to say, read the review not the stars. This lens has to get 5 for its build quality and price. I wanted something for my A7c that was compact and fun – and could also be used for stylized video on my A7s III. I wanted the soft corners and vignetting wide open and am happy with it. The lens is a bit heavier than I expected though. It's heavier than a few Samyang primes I have and as heavy as vintage primes that are more than twice as big (Zeiss Jena/Super-Takumar). It's not heavy in absolute terms, just for its size.

[Manual Focus] I love the click on the aperture ring and the manual focus works well. All around it produces really great images for the price and it is really fun to use.

[f/2] I purchased a used Crown Graflex Large format camera with a reflector back. The f.64 is a reasonable price in comparison to other large format backpacks that cost twice its price. It has enough room to hold my 4x5 large format camera, the reflector back, another small camera, and accessories. The film pockets are removable, padded, and fit the 4x5 film holders.